Interested in the article LED lights arc shell friend, must be interested in the LED also, let's learn, that the differences.

LED (Light Emitting Diode), light-emitting diodes, or leds, and is a kind of ability to electric energy into visible Light solid state semiconductor devices, it can be directly put DianZhuan into Light. The heart of the LED is a semiconductor chip, chip attached on a bracket, at the end of the end is negative, the other end connected to the power of the anode make whole chip is encapsulated by epoxy resin. Semiconductor chip consists of two parts, one part is a p-type semiconductor, dominated by holes in it, the other end is n-type semiconductor, here is mainly electronic. But this two kinds of semiconductor connected, between them to form a p-n junction. When a current flows through a wire to the chip, the electron will be pushed P area, electron and holes in the P zone compound, then will be issued in the form of photon energy, this is the principle of LED.

And the wavelength of light was the color of the light, is determined by the formation of p-n junction material. It is a semiconductor light emitting diode control through the display mode, used to display text, graphics, images, video, video, animation, market signal and all kinds of information of the display. Because of easy control, low voltage dc drive, after combination performance colorful, long life and other advantages, widely used in city each project, large screen display system. LED display screen, can be used as under computer control, the display of ever-changing color video and images. LED is a semiconductor to electric energy into visible light.